#16 single jack chain, bright galvanized (15 feet) the wire diameter of this chain is #16. the wire diameter of chain is the thickness of the wire used in each individual chain link manufactured from steel wire for strength and durability raw wire that has been zinc plated for corrosion resistance prior to being manufactured into chain the working load limit of this chain is 10 lbs. the working load limit of chain is the maximum load or weight that be held by the chain. product type: chain construction: single jack diameter: 1/16 in. trade size: no. 16 welding type: weldless finish: stainless steel length: 20 ft. working load limit 10 lb.